The invention discloses a flexible OLED panel, which comprises a flexible substrate, a plurality of metal conductors, a light emitting layer and a packaging layer, wherein the flexible substrate comprises a light emitting region, a thinning region and a wiring region, the light emitting area is adjacent to the wiring region, the thinning region is arranged between the light emitting region and thewiring region, and the thinning region comprises a substrate groove and a first extendible material arranged in the substrate groove; the plurality of metal conductors are arranged on the light emitting region and the wiring region of the flexible substrate; the light emitting layer is arranged above one of the plurality of metal conductors, and the light emitting layer is positioned in the lightemitting region; and the packaging layer is arranged on the light emitting layer, the packaging layer comprises a packaging layer groove positioned in the thinning region, and the packaging layer groove is opposite to the substrate groove.